Aahley F.
asked • 08/16/18Find all real values of x when f (x)=12-x^2÷5
F (x)=12-x^2÷5
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1 Expert Answer
Philip P. answered • 08/16/18
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f(x) = (-1/5)x2 + 12
To find the zeros, set f(x) = 0:
0 = (-1/5)x2 + 12
(1/5)x2 = 12
x2 = 60
x = ±√60 = ±√(4·15) = ±2√15
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Philip P.
08/16/18